Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba9ad7217a99ba7…

MALICIOUS

PDF

70.9 KB Created: 2020-11-22 02:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0184092a81b8b295f7b434769c5ed078 SHA-1: 127c7a51fb475ceaadfb87ce522e96370bec4172 SHA-256: 3ba9ad7217a99ba7f87ea99bbb8150fd6c224a3a94c5c289ff2a65818545785c
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one leading to a potentially malicious APK download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/aws?utm_term=ramen+noodles+nutrition+information+without+seasoning In PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/zabufezijej.pdfIn PDF document text
    • https://mugabezimezik.weebly.com/uploads/1/3/4/2/134235171/biniwoniv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_5f9e010619047.pdfIn PDF document text
    • https://wemugevesusufe.weebly.com/uploads/1/3/4/4/134467109/razagekagutesibunotu.pdfIn PDF document text
    • https://rizenorugeworo.weebly.com/uploads/1/3/4/3/134379336/xafadotamixeparevi.pdfIn PDF document text
    • https://ligavovifoma.weebly.com/uploads/1/3/4/5/134522072/8388489.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/super_cleaner_antivirus_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/between_the_sheets_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e278c06-a537-4439-8450-dcecb6a7448f/vuxobezezik.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/86512869048.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/lost_creek_hoa_aledo_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/guided_media_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/27239542961.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB4 5420 bytes
SHA-256: f116534b47349180cd6e83ae8e9da815437e8c2469ecfcd7c675399fa7c6618d
font_01_sfnt_off0000e006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE006 1940 bytes
SHA-256: 414d786b459f0f5d2a731291ef1b870d88176140611ada2eab9f82aaf6e76e23
font_02_sfnt_off0000e93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 10836 bytes
SHA-256: 35d2fa586c5786f08afb88095192c4ca735247188785934771a5af782b85ed2d

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